Wrench.



PATENTED SEPT. 8, 1908.

H. N. ROTHWEILER.

WRENCH. APPLICATION FILED MAR.23,1908.

W; gm p I M54 2 5 2% r E: m 9 fi 4 HARVEY NELSON ROTHWEILER, OF SEATTLE,WASHINGTON.

WRENCH.

Application filed March 23, 1908.

Specification of Letters Patent.

Patented Sept. 8, 1908.

Serial No. 422,859.

To all whom it may concern:

Be it known that I, HARVEY NELSON ROTI-IWEILER, a citizen of the UnitedStates, residing at Seattle, in the county of King and State ofWVashington, have invented new and useful Improvements in Wrenches, ofwhich the following is a clear and concise specification.

My invention relates to a pipe wrench having a slidably mounted movablejaw and removable threaded portion on the shank of said wrench.

The objects of my invention are to provide a slidably mounted movablejaw for pipe wrenches in which no retaining'pins or other detachableretaining devices are used; to

rovide an efl icient pipe wrench with few oose pieces; to provide a pipewrench having removable threads on the shank thereof. I accomplish theseas well as other objects by the construction now preferred by me andillustrated in the accompanying drawings in which Figure 1 is afragmentary view of the modification of the frame piece of my device.Fig. 2 is a view of my entire device. Fig. 3 is a transverse section ofthe preferred form of frame piece of my device. Fig. 4 is a transversesection of the modification of the frame piece of my device. Fig. 5 is atransverse section of the movable jaw member of my device. Fig. 6 is amodification of the movable jaw member of my device. Fig. 7 is anelevation of one of the renewable thread elements of my device, and Fig.8 is a section at 8, Fig. 2.

Similar reference numerals refer to similar parts throughout the severalviews of my device as illustrated in the accompanying drawings.

My wrench consists essentially of the fixed jaw 1 formed integral withthe shank 2 which terminates in the handle 3. The shank 2 is providedwith detachable thread elements 4, beveled at the ends 5 thereof to forma dovetail and snugly fitting the like shaped opening in said shank 2and preferably disposed so that the threads 6 will project substantiallyabove said shank 2 to permit the nut 7 to be freely removed from saidshank 2 and over the handle 3. Said nut 7 travels in the opening 8provided in the frame piece 9, which is slidably mounted on the shank 2and thread elements 4. Said frame piece 9 is provided with an inclinedsurface 10 and dove-tail 11 adapted to receive a like shaped dove-tail12 on the movable jaw 13.-

The movable jaw 13 may be readily removed when the frame piece 9 hasbeen removed from the shank and handle of my device by moving in thedirection indicated by the arrow above said jaw 13 in Fig. 2 of theaccompanying drawings. Said dove-tail preferably ends at 14 to form astop 15 thus 'miting the travel of said movable jaw in the oppositedirection from that indicated by the said arrow. To force said movablejaw to the normalposition thereof, '11. 6., against said stop 15 I haveprovided a hole 16 having a coil spring 17 therein, and adapted to fitthe pin 18 having one end thereof resting against said spring and theopposite end against said threads 6. It is obvious that by applyingforce to said handle 3 in thedirection of the arrow at the lower end ofFig. 2 that said movable jaw will slide on said inclined surface 10 andwill overcome said spring 17 and will snugly grip a cylindrical objectas 19 held between said jaws 1 and 13. In Figs. 1, 4 and 6 I have shownthe projecting portion of the dove-tail formed on said frame piece 9,while in my preferred form said projecting portion is formed on saidmovable jaw 13, this being done in view of the tempering of said jaw 13which by experiment has proved more uniform by the preferredconstruction. It is obvious that when said frame piece 9 is in itsnormal position that said thread elements 4 cannot be removed eventhough by accident or poor workmanship said elements may have becomeloosened.

I do not wish to be limited to the specific construction hereindescribed but wish to depart from such details as are within the scopeof our patent.

It will be noticed from the drawing that the dove tail rib and tenonconnecting the sliding jaw 9 and the jaw face 13 extend in the directionof length of the jaw face, and the dove tail groove in the inclined faceof the jaw 9 extends at its inner end to and communicates with theopening in the said sliding jaw for the wrench bar, this constructionpermitting the application and removal of the jaw face 13 when thesliding jaw is removed from the wrench bar, and the wrench barpreventing the removal of the j aw face 13 when the parts are assembledas shown in Fig. 2 of the drawing.

As best shown in Fig. 2, a spring is interposed between the thread plate4 and the sliding jaw face, which is dove tailed in the sliding jaw, andthis spring thereby performs the double function of actuating thesliding 5 jaw face and also steadying the thread plate at its connectionwith the wrench bar. The sliding jaw 9 constitutes a frame fittingentirely around the nut 7, see Fig. 2, so that the said jaw is notweakened to any material ex- 10 tent by the lateral opening for thepassage of the nut, and the nut is inclosed by the frame like structureof the sliding jaw and the spring interposed between the jaw facesliding on the jaw 9, and the Wrench bar serves to actuate the slidingjaw face and by its pressure against the wrench bar will tighten thesliding jaw 9 upon the wrench bar and upon the nut 7 inclosed by theframe like structure of the sliding jaw as will be best understood fromFig. 2 of the drawing.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United States is:

1. The improvement in wrenches comprising a wrench bar having a fixedjaw, and

provided with under-cut recesses in its opposite edges, thread platesfitting in said recesses and held by the dove tail form thereof, a jawsliding over the wrench bar and over the thread plates and having a nutengaging therewith, the said jaw operating to prevent the displacementof the thread plates when fitting thereover, a jaw face having a dovetail connection with the sliding jaw, and a spring interposed betweenthe inner end of the said jaw face and thread plate whereby to actuatethe jaw face and to steady the thread plate in position, substantiallyas set forth.

2. The improved wrench comprising a wrench bar having a jaw, a jawsliding on the wrench bar and having a frame like construction to fitover an adjusting nut, an adjusting nut in said frame like sliding jaw,and screwing upon the wrench bar, a jaw face having a dove tailconnection with the sliding jaw, and a spring acting between the innerend of the jaw face and the wrench bar whereby to actuate the jaw faceand to tighten'the sliding jaw upon the nut and wrench bar, all

substantially as and for the purposes set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HARVEY NELSON ROTHWEILER.

Witnesses:

PAUL A. TALBOT, BESSIE BROWN.

